Logic

Date:  Thursday, January 17, 2013
Location:  2866 East Hall (4:00 PM to 7:00 PM)

Title:  Domination of Continuous and Borel functions

Abstract:   Let X be the set of continuous functions from Baire space to the integers. Let Y be the set of Borel functions from Baire space to the integers. We can order both of these sets with respect to everywhere domination. It is not hard to see that the cofinalities of both of these orderings are uncountable cardinals less than or equal to the cardinal of the continuum. In this talk, we will compute both of these cardinals. Similar results can be obtained by replacing Baire space with, say, the real line with the standard topology.


Speaker:  Daniel Hathaway
Institution:  U. Mich.

Event Organizer:   Andreas Blass    ablass@umich.edu

 

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